Processing and Testing of Ultrahigh Temperature Fiber-Reinforced Ceramics

Ultramet has developed innovative processing for ultrahigh temperature fiber-reinforced ceramics. Using a rapid melt infiltration process, Ultramet fabricates high strength fiber-reinforced ceramic matrix composite structures that can operate in various hot-gas environments at temperatures in excess of 2800°C. A low temperature process has also been developed to apply fiber interface coatings to protect the fibers during processing and to maximize composite mechanical properties during use. The processing is applicable to ceramic matrices with extremely high melting points including zirconium carbide, hafnium carbide, tantalum carbide, and ceramic alloys. Hot-gas testing of melt infiltrated ceramic matrix composite structures in oxidizing environments has been performed at various facilities, and the components survived with low or no erosion. Processing and testing of ceramic composite materials will be discussed.